dienst, from wnbc. jonathan, you have some information on travel by tamerlan tsarnaev in and out of the country. which could be a significant lead. >> it is a lead that has concerned authorities and they're taking a hard look at it he's the one with the black hat, the one who died in the standoff with police overnight. the records that have, that explain to us is that he traveled last year, over six-month period, out of the united states. he flew out of new york on january 12th, 2012, to moscow and returned on july 17th, 2012. and whether he was visiting relatives, we're told he does have family there. but at the same time, they want to know whether he went for any sort of terror training during those travels. a couple of other points that highlight how these two brothers were not on the radar screen of law enforcement until after the bombings at the marathon. and that's because on these travel documents, for this older brother, he's listed as a person or instrument that may pose a threat to the security of the united states. and that that is posted on the documents this morning.